I don't agree thats it's the extra weight on the string as much as the placement of the weight. if you was to evenly displace that weight of your knock closer to the cams it would make your bow faster. Ok I know I'm being anal but I'm board.:wink:Any excess weight on your string will slow your speed down. I try and shoot a very tight loop to keep the weight down and it also keeps it from turning. If you are concerned with speed try and keep your peep, loop, buttons, nocks as light as possible. I have even been shooting G5 peeps unserved in my string to conseve weight. Ever little bit helps to get that extra few fps.
Good luck!
Not always, I have found some cams don't benifit from speed nocks.I don't agree thats it's the extra weight on the string as much as the placement of the weight. if you was to evenly displace that weight of your knock closer to the cams it would make your bow faster. Ok I know I'm being anal but I'm board.:wink: